TY - JOUR A1 - Gebhardt, M.O. A1 - Gumenyuk, Andrey A1 - Rethmeier, Michael T1 - Numerical analysis of hot cracking in laser-hybrid welded tubes T2 - Advances in materials science and engineering N2 - In welding experiments conducted on heavy wall pipes, the penetration mode (full or partial penetration) occurred to be a significant factor influencing appearance of solidification cracks. To explain the observed phenomena and support further optimization of manufacturing processes, a computational model was developed, which used a sophisticated strategy to model the material. High stresses emerged in the models in regions which showed cracking during experiments. In partial penetration welding, they were caused by the prevention of weld shrinkage due to the cold and strong material below the joint. Another identified factor having an influence on high stress localization is bulging of the weld. PB - Hindawi Publishing Corporation CY - New York, NY, USA PY - 2013 UR - https://opus4.kobv.de/opus4-bam/frontdoor/index/index/docId/30296 AN - OPUS4-30296 UR - https://nbn-resolving.org/urn:nbn:de:kobv:b43-302961 SN - 1687-8442 SN - 1687-8434 IS - Article ID 520786 SP - 1 EP - 8 AD - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany